<template>
                                  <!-- 移除累 -->
  <div class='home-category ' @mouseleave="curCateId=null">
    <ul class="menu" v-if="$store.state.category.list.length >0">
                    <!-- 高亮 -->
      <li :class="{active:curCateId===item.id}" v-for="item in cateList" :key="item.id" @mouseenter="curCateId=item.id">
        <RouterLink to="/">{{item.name}}</RouterLink>

        <RouterLink v-for="sub in item.children" :key="sub.id" to="/">{{sub.name}}</RouterLink>

      </li>
    </ul>
    <template v-else>
      <!-- 结构要和真实数据一致
       -->
       <ul class="menu">
         <li v-for="i in 10" :key="i">
            <XtxSkeleton width="40px" height="20px" bg="rgba(255,255,255,0.2)" style="margin-right:5px"/>
            <XtxSkeleton width="50px" height="20px" bg="rgba(255,255,255,0.2)" style="margin-right:5px"/>
            <XtxSkeleton width="50px" height="20px" bg="rgba(255,255,255,0.2)" style="margin-right:5px"/>
         </li>
      </ul>
    </template>
    <!-- 弹层 -->
    <div class="layer ">
    <h4>分类推荐 <small>根据您的购买或浏览记录推荐</small></h4>
   <template v-if="curCate && curCate.id==='brand'">
        <!-- 品牌 -->
        <ul>
          <li class="brand" v-for="brand in curCate.goods" :key="brand.id">
            <RouterLink to="/">
              <img :src="brand.picture" alt="">
              <div class="info">
                <p class="place"><i class="iconfont icon-dingwei"></i>{{brand.place}}</p>
                <p class="name ellipsis">{{brand.name}}</p>
                <p class="desc ellipsis-2">{{brand.desc}}</p>
              </div>
            </RouterLink>
          </li>
        </ul>
      </template>
       <template v-else>
        <!-- 分类 -->
        <ul v-if="curCate">
          <li v-for="goods in curCate.goods" :key="goods.id">
            <RouterLink :to="'/goods/'+goods.id">
              <img :src="goods.picture" alt="">
              <div class="info">
                <p class="name ellipsis-2">{{goods.name}}</p>
                <p class="desc ellipsis">{{goods.desc}}</p>
                <p class="price"><i>¥</i>{{goods.price}}</p>
              </div>
            </RouterLink>
          </li>
        </ul>
      </template>
  </div>
  </div>
</template>

<script>
import { computed, reactive, ref } from 'vue'
import { useStore } from 'vuex'
import { findBrand } from '@/api/home'
export default {
  name: 'HomeCategory',
  // 1. 获取vuex的一级分类，并且只需要两个二级分类
  // 2. 需要在组件内部，定义一个品牌数据
  // 3. 计算属性：根据vuex的分类数据和组件中定义品牌数据，得到左侧分类完整数据(9分类+1品牌)数组
  // 4. 进行渲染即可
  setup () {
    const brand = reactive({
      id: 'band',
      name: '品牌',
      children: [{ id: 'brand-children', name: '推荐品牌' }],
      goods: []
    })
    const store = useStore()
    const cateList = computed(() => {
      const list = store.state.category.list.map(item => {
        return {
          id: item.id,
          name: item.name,
          // 数组取前两个元素slice
          children: item.children && item.children.slice(0, 2),
          goods: item.goods
        }
      })
      // 加上品牌
      list.push(brand)
      return list
    })
    // 获取当前分类逻辑
    const curCateId = ref(null)
    const curCate = computed(() => {
      const cate = cateList.value.find(item => item.id === curCateId.value)
      console.log('执行了', curCateId.value, cate)
      return cate
    })
    findBrand().then(data => {
      console.log('findBrand', data)
      brand.goods = data.result
    })
    // 鼠标进入，显示推荐商品
    // 1.记录当前鼠标在那个分类记下编号
    // 2.根据编号去cateList取出当前要显示的数据
    return { cateList, curCate, curCateId }
  }
}
</script>

<style scoped lang='less'>
.home-category {
  li.brand {
  height: 180px;
  a {
    align-items: flex-start;
    img {
      width: 120px;
      height: 160px;
    }
    .info {
      p {
        margin-top: 8px;
      }
      .place {
        color: #999;
      }
    }
  }
}
  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255,255,255,0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;
    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;
      small {
        font-size: 16px;
        color: #666;
      }
    }
    ul {
      display: flex;
      flex-wrap: wrap;
      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;
        &:nth-child(3n) {
          margin-right: 0;
        }
        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;
          &:hover {
            background: #e3f9f4;
          }
          img {
              width: 95px;
              height: 95px;
          }
          .info {
            padding-left: 10px;
            line-height: 24px;
            width: 190px;
            .name {
              font-size: 16px;
              color: #666;
            }
            .desc {
              color: #999;
            }
            .price {
              font-size: 22px;
              color: @priceColor;
              i {
                font-size: 16px;
              }
            }
          }
        }
      }
    }
  }
  &:hover {
    .layer {
      display: block;
    }
  }
  width: 250px;
  height: 500px;
  background: rgba(0,0,0,0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &:hover,&.active {
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }

}
</style>
